From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Modification to remove weakening gashes from the Wraith frame cross member.
| Identifier | ExFiles\Box 8\10\ 10-page177 | |
| Date | 31th January 1939 | |
| BY/NS.{Norman Scott} c. Rm.{William Robotham - Chief Engineer} c. ROY{Sir Henry Royce}/Les.{Ivan A. Leslie} 627 DA.{Bernard Day - Chassis Design}18/G.31.1.39. WRAITH FRAME. AFM{Anthony F. Martindale} In the frame cross, approximately lined up with the 'U' section cross member, which carries the rear engine mounting, four deep gashes are cut through the lower upturned edges of the cross flanges. In the Experimental schemes, these gashes appear, though much less in depth, but in the scheme which went into production G.CD.477 they are omitted, and it will be seen that there is no longer any need for them, clearance being adequate without. Unfortunately, they do not seem to have been removed from the detail. As they are a source of weakness, this should be done immediately, and no more frames come in with them. Will BY/NS.{Norman Scott} issue an instruction to ROY{Sir Henry Royce}/Les.{Ivan A. Leslie} to have this modification carried out immediately. DA.{Bernard Day - Chassis Design} | ||